diff options
author | Otavio Salvador <otavio@ossystems.com.br> | 2022-01-12 07:40:50 -0300 |
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committer | GitHub <noreply@github.com> | 2022-01-12 07:40:50 -0300 |
commit | 712fcc850e5a6d0867b0d97a0b79f1addd01998f (patch) | |
tree | d092452bebc70059ffa9f913a1daea74d656300e /fs/btrfs/tree-log.c | |
parent | e99f775ed2f46b225106f0a156116a0080d16740 (diff) | |
parent | 0156d956a951c70743d2338132662b29aeb8847d (diff) |
Merge pull request #517 from denisdrozdov/5.4-2.3.x-imx
Merge tag 'v5.4.161' into 5.4-2.3.x-imx
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r-- | fs/btrfs/tree-log.c | 83 |
1 files changed, 54 insertions, 29 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 8ea4b3da85d1..7bc4477d7ee7 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -900,9 +900,11 @@ out: } /* - * helper function to see if a given name and sequence number found - * in an inode back reference are already in a directory and correctly - * point to this inode + * See if a given name and sequence number found in an inode back reference are + * already in a directory and correctly point to this inode. + * + * Returns: < 0 on error, 0 if the directory entry does not exists and 1 if it + * exists. */ static noinline int inode_in_dir(struct btrfs_root *root, struct btrfs_path *path, @@ -911,29 +913,35 @@ static noinline int inode_in_dir(struct btrfs_root *root, { struct btrfs_dir_item *di; struct btrfs_key location; - int match = 0; + int ret = 0; di = btrfs_lookup_dir_index_item(NULL, root, path, dirid, index, name, name_len, 0); - if (di && !IS_ERR(di)) { + if (IS_ERR(di)) { + if (PTR_ERR(di) != -ENOENT) + ret = PTR_ERR(di); + goto out; + } else if (di) { btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); if (location.objectid != objectid) goto out; - } else + } else { goto out; - btrfs_release_path(path); + } + btrfs_release_path(path); di = btrfs_lookup_dir_item(NULL, root, path, dirid, name, name_len, 0); - if (di && !IS_ERR(di)) { - btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); - if (location.objectid != objectid) - goto out; - } else + if (IS_ERR(di)) { + ret = PTR_ERR(di); goto out; - match = 1; + } else if (di) { + btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); + if (location.objectid == objectid) + ret = 1; + } out: btrfs_release_path(path); - return match; + return ret; } /* @@ -1160,7 +1168,10 @@ next: /* look for a conflicting sequence number */ di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir), ref_index, name, namelen, 0); - if (di && !IS_ERR(di)) { + if (IS_ERR(di)) { + if (PTR_ERR(di) != -ENOENT) + return PTR_ERR(di); + } else if (di) { ret = drop_one_dir_item(trans, root, path, dir, di); if (ret) return ret; @@ -1170,7 +1181,9 @@ next: /* look for a conflicting name */ di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir), name, namelen, 0); - if (di && !IS_ERR(di)) { + if (IS_ERR(di)) { + return PTR_ERR(di); + } else if (di) { ret = drop_one_dir_item(trans, root, path, dir, di); if (ret) return ret; @@ -1495,10 +1508,12 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, if (ret) goto out; - /* if we already have a perfect match, we're done */ - if (!inode_in_dir(root, path, btrfs_ino(BTRFS_I(dir)), - btrfs_ino(BTRFS_I(inode)), ref_index, - name, namelen)) { + ret = inode_in_dir(root, path, btrfs_ino(BTRFS_I(dir)), + btrfs_ino(BTRFS_I(inode)), ref_index, + name, namelen); + if (ret < 0) { + goto out; + } else if (ret == 0) { /* * look for a conflicting back reference in the * metadata. if we find one we have to unlink that name @@ -1556,6 +1571,7 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, btrfs_update_inode(trans, root, inode); } + /* Else, ret == 1, we already have a perfect match, we're done. */ ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + namelen; kfree(name); @@ -1944,8 +1960,8 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, struct btrfs_key log_key; struct inode *dir; u8 log_type; - int exists; - int ret = 0; + bool exists; + int ret; bool update_size = (key->type == BTRFS_DIR_INDEX_KEY); bool name_added = false; @@ -1965,12 +1981,12 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, name_len); btrfs_dir_item_key_to_cpu(eb, di, &log_key); - exists = btrfs_lookup_inode(trans, root, path, &log_key, 0); - if (exists == 0) - exists = 1; - else - exists = 0; + ret = btrfs_lookup_inode(trans, root, path, &log_key, 0); btrfs_release_path(path); + if (ret < 0) + goto out; + exists = (ret == 0); + ret = 0; if (key->type == BTRFS_DIR_ITEM_KEY) { dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid, @@ -1985,7 +2001,14 @@ static noinline int replay_one_name(struct btrfs_trans_handle *trans, ret = -EINVAL; goto out; } - if (IS_ERR_OR_NULL(dst_di)) { + + if (dst_di == ERR_PTR(-ENOENT)) + dst_di = NULL; + + if (IS_ERR(dst_di)) { + ret = PTR_ERR(dst_di); + goto out; + } else if (!dst_di) { /* we need a sequence number to insert, so we only * do inserts for the BTRFS_DIR_INDEX_KEY types */ @@ -2467,7 +2490,9 @@ again: else { ret = find_dir_range(log, path, dirid, key_type, &range_start, &range_end); - if (ret != 0) + if (ret < 0) + goto out; + else if (ret > 0) break; } |